Update mini program development documentation and enhance user interface elements

- Added a new entry for the latest mini program development rules and APIs in the evolution index.
- Updated the skill documentation to include guidelines on privacy authorization and capability detection.
- Modified the read and settings pages to improve user experience with new input styles and layout adjustments.
- Implemented user-select functionality for text elements in the read page to enhance interactivity.
- Refined CSS styles for better responsiveness and visual consistency across various components.

soul-api/internal/handler/admin_dashboard.go

@@ -7,6 +7,7 @@ import (
 
 	"soul-api/internal/database"
 	"soul-api/internal/model"
+	"soul-api/internal/wechat"
 
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
@@ -179,6 +180,26 @@ func buildRecentOrdersOut(db *gorm.DB, recentOrders []model.Order) []gin.H {
 	return out
 }
 
+// AdminDashboardMerchantBalance GET /api/admin/dashboard/merchant-balance
+// 查询微信商户号实时余额（可用余额、待结算余额），用于看板展示
+// 注意：普通商户可能需向微信申请开通权限，未开通时返回 error
+func AdminDashboardMerchantBalance(c *gin.Context) {
+	bal, err := wechat.QueryMerchantBalance("BASIC")
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"error":   err.Error(),
+			"message": "查询商户余额失败，可能未开通权限（请联系微信支付运营申请）",
+		})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"success":         true,
+		"availableAmount": bal.AvailableAmount, // 单位：分
+		"pendingAmount":   bal.PendingAmount,   // 单位：分
+	})
+}
+
 func buildNewUsersOut(newUsers []model.User) []gin.H {
 	out := make([]gin.H, 0, len(newUsers))
 	for _, u := range newUsers {